Home / 10,408.74-15,587.16-8,685.06

Finding the Fourth Proportional to 10,408.74, 15,587.16 and 8,685.06

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Solution

The fourth proportional to 10,408.74, 15,587.16 and 8,685.06 is: 13,005.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,408.74 : 15,587.16 = 8,685.06 : x
  2. Step 2: Convert to fraction form
    10,408.74/15,587.16 = 8,685.06/x
  3. Step 3: Cross multiply
    10,408.74x = 15,587.16 × 8,685.06
  4. Step 4: Simplify right side
    10,408.74x = 135,375,419.83
  5. Step 5: Solve for x
    x = 135,375,419.83/10,408.74
  6. Step 6: Final answer
    x = 13,005.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.